Add Advanced Stats Functionality (#96)

[hirememorey]

This PR introduces advanced stats functionality to the NHL API. It addresses issue #96 by adding new modules and examples.

• advanced_stats.py: Implements the advanced stats retrieval methods.
• advanced_parsers.py: Contains parsing logic to handle the advanced stats response data.
• examples/: Provides example scripts to demonstrate the usage of these new endpoints.
• cookies.py: Updates cookie handling to support additional API endpoints.

Testing Instructions:

1. Clone this branch and install any necessary dependencies.
2. Run the example scripts in the examples/ folder to see the advanced stats in action.
3. Please refer to the inline comments and documentation in the code for further details.

I welcome any feedback or suggestions for further refinement.

[coreyjs]

Thanks for this! I'll be away until 2/23, so I don't think I can give this a full review before then, but I will try.

[coreyjs]

So this is introducing design patterns that are separate from the core API library, almost as if they are separate utilities. Do you think there is a way to incorporate this into the current design structure, for something like:

client.advanced_stats.goalie_stats()

I can see the difficulty in running asynchronous web sockets to load this, but having it incorporated into the current library design would be beneficial for end users.

Depending on difficulty, could do some kind of utilities options, where it can be installed as an optional package include.